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Justin Timberlake challenged to dance-off at Marine Corps Ball

Justin Timberlake better be prepared to bust a move at tonight's Marine Corps Ball, because his date Cpl. Kelsey de Santis is challenging the singer to a dance-off.

So what if he's an international star with years of training from his early days with the Mickey Mouse club and N'Sync. She says bring it on. In fact, he might want to start doing "The Dougie" now.

“My friends keep saying, ‘Dance-off!’ They know about my skills,” she told Access Hollywood. “I honestly don’t think he’ll be able to keep up with my group of people.” In fact, she's got “multiple signature moves,” and yes, one of them is “The Dougie.”

What if Timberlake tries to steal a smooch at the ball? De Santis, who is stationed at the base in Quantico, Va., is fine with that too, but she would never "force anything upon him."

“Of course, I’m single! I don’t know [if a kiss will happen.] I guess that’s all up to JT and what his plans are,” she explained on the show.

The Marine asked Justin to the Marine Corps Ball in Washington, D.C., back in July via Youtube, after his "Friends With Benefits" costar Mila Kunis accepted a similar invitation from Sgt. Scott Moore. Check out De Santis' invitation below.